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Finding the Fourth Proportional to 7,765.88, 10,716.54 and 4,228.88

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Solution

The fourth proportional to 7,765.88, 10,716.54 and 4,228.88 is: 5,835.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,765.88 : 10,716.54 = 4,228.88 : x
  2. Step 2: Convert to fraction form
    7,765.88/10,716.54 = 4,228.88/x
  3. Step 3: Cross multiply
    7,765.88x = 10,716.54 × 4,228.88
  4. Step 4: Simplify right side
    7,765.88x = 45,318,961.68
  5. Step 5: Solve for x
    x = 45,318,961.68/7,765.88
  6. Step 6: Final answer
    x = 5,835.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.